Direct current power supply



FIG. 1 is a perspective view of the direct current power supply;

FIG. 2 is a front view of the direct current power supply, the back viewbeing a mirror image the front view;

FIG. 3 is a bottom view of the direct current power supply;

FIG. 4 is a top view of the direct current power supply; and,

FIG. 5 is a right side view of the direct current power supply, the leftside view being a mirror image the right side view.

The broken lines shown are for illustrative purposes only and form nopart of the claimed design.

The broken lines which define the bounds of the claimed design form nopart thereof.

I claim the ornamental design of a direct current power supply, as shownand described.